John b



(No Model.)

J. B. VALLEE.

Dvetai'l Pattern.

No. 237.146. Patented Feb.1,"1ss1.

I o2? o N-FERS. PHOTOJJTHOGRAPMER, WASHINGTON. D C.

UNITED STATES PATENT OEEICE.

JOHN B. VALLEE, OF TROY, NEW YORK.

DOVETAlL-PATTERN.

SPECIFICATION forming part of Letters Patent No. 237,146, dated February1, 1881.

Application filed May 3, 1880.

To all whom it may concern.'

Be it known that I, JOHN B. VALLEE, of the city of Troy, in the countyof Rensselaer and State of New York, have invented a new and usefulImprovementin Dovetail-Patterns, of which the following is aspecification.

This invention is designed as an improvenient upon certain otherimprovements in dovetail-patterns for which an application for Letters`Patent of the United States was filed by me on the 8th day of December,1879, the nature and objects of which were fully set forth therein, saidimprovement consisting in substitutirne;for the pegs and pins (shown anddescribed in application aforesaid) hinged attachments,by means ofwhich, when combined with other port-ions of the device, also previonslyspecified, similar operations may be performed and the same purposesmore readily effected.

In the accompanying drawings, Figure 1 is a perspective view; Fig. 2, asectional View taken through dotted lille .fr in Fig. 1, and Fig. 3 abottom view ot' hinged side piece detached.

Similar letters of reference in each indicate corresponding parts. l

A represents portion of main pattern, and B B represent recessed sidepieces provided with springs O C, as in former device, said side piecesbeing pivoted to hinged plates D D, which may be attached to mainpattern aforesaid by screws or solder, as most convenient. E in Fig. 2shows part of cope.

(No model.)

When in operation the side pieces are raised by action of the springs torelease the cope, when the same is lifted off in a similar manner,` andas more fully described in previous application, the advantages overformer device being the simpler and cheaper construction, the readiermanner in which the side pieces may be connected with main pattern, andthe greater certainty and ease of operation. When, as in this device, afixed pivot is provided in rear of side pieces, which, on account of theincreased leverage thus aiorded, admits of the saine being more readilyraised by the springs or lifted. upon withdrawing the cope, lateralslipping of the parts upon each other is also avoided, as liable withformer construction.

As in previous application, I do not claim, broadly, side pieces thatmay be raised or swung back on lifting the cope. Nor do I claim,broadly, hinges for connecting the side pieces with main pattern; but

What l do claim, and desire to secure by Letters Patent, is-

In patterns for molding dovetails, the combination ot' the recessed andhinged side pieces. B B, springs O O, and stationary hinged plates D Dwith the main pattern A and with each other, substantially as shown anddescribed, for the objects herein set forth.

JOHN B. VALLEE. Witnesses:

L. R. BEGKLEY, H. LIsLE FLEMING.

